Above Mauville city and slightly to the right. However, you will need to get the go-goggles from brendan (or May). To get this, defeat the fire type gym leader Flannery, and Brendan (or may), impressed, will give them to you WITHOUT a battle.(Ugh, I'm such a Pokemon nerd...)
No there is no desert underpass in Ruby
Trapinch are found in the desert.
The desert.
in the desert on Pokemon emerald,sapphire,and ruby EASY
it is right side
trapinch is located in the desert part of Pokemon sapphire or ruby; maybe in emerald.
it is in the top right of the desert. you can choose between it and the claw fossil
watch "how to get the three regi's" on youtube
you have to go to route 105 and blazeken path should be there
To obtain a Ditto in Pokemon Ruby or Sapphire, you must trade with Pokemon Emerald, where you can find it in the Desert Underpass, or you can trade it with any games from either Generation I or Generation II. - Badminton
it is a long process. you can go to gamesrader for a Pokemon ruby FAQ but i can tell you there is a cave in the desert and after reading the braille, you step right twice down twice and use strength
i found one in the desert at the east of it with the itemfinder and out at the middle of the sea